Store is quite simple:

Store

export const ContractStore = signalStore(
  {providedIn: 'root'},
  withState(initialState),

  withComputed(({contracts, searchQuery}, ) => {
    const contractService = inject(ContractService)
    return {
      sortedContracts: computed(() => {

        const sortedContracts = contractService.sortContractsByFirstName(contracts())
        
        })
        return sortedContracts
      }),
    }
  })
);

The service is quite large, but this is one of the functions inside it.

Service

 public sortContractsByFirstName(contracts: Array<AnyContractDTO>): Array<AnyContractDTO> {
    contracts.sort((a, b) => {
      if (a.personalInformation.firstName.toLowerCase() < b.personalInformation.firstName.toLowerCase()) {
        return -1;
      } else if (a.personalInformation.firstName.toLowerCase() > b.personalInformation.firstName.toLowerCase()) {
        return 1;
      } else {
        return 0;
      }
    });
    return contracts
  }

But I keep getting the error: ERROR TypeError: contractService.sortContractsByFirstName is not a function.

Does anyone know why this might be?